Blue Moons Since 2000: Dates of 19 blue moons

Since 2000 there have been 19 blue moons when counting both the second full moons in a calendar month along with the extra full moon during a season.

There are two definitions of blue moons. The most common, and the one you likely know is when two full moons occur in the same month. The second full moon is typically called a blue moon.

The second definition of a blue moon relates having an extra full moon during a season. When a season has four full moons, the third full moon of the season is also called a blue moon, or a seasonal blue moon to help distinguish between the other definition.

Below are the dates of the blue moons since 2000.

Full moon colored blue for the dates of Blue Moons since 2000

The dates and times provided by NASA for the United States (USA) Eastern Standard Time (EST) and Eastern Daylight Time (EDT) timezones. Also below is the Coordinated Universal Time (UTC) time for reference. This was previously referred to as Greenwich Mean Time (GMT). Since your local timezone may be different, the exact dates may shift for your calendar.

Blue Moons Since 2000 Calendar

Since 2000 there have been 19 full moons when counting both the second full moons in a month and the seasonal blue moons. There have been 10 second full moons in a month and 9 seasonal blue moons.

2000-2009 Blue Moons

From 2000 to 2009 there have been 8 blue moons. November 2001, July 2004, May 2007 and December 2009 each had a second full moon during their months. Depending on your timezone, the blue moon may have shifted to the next month.

November 2010, August 2013, May 2016, and May 2019 each as a seasonal blue moon as each of their seasons had 4 full moons

The blue moons that occurred from 2000 to 2009 include:

YearBlue MoonUS Eastern TimeUTC TimeBlue Moon Type
2000February 19, 200011:27 AM EST4:27 PM UTCSeasonal
2001November 30, 20013:49 PM EST2001 8:49 PM UTC2nd full moon in a month
2002August 22, 20026:29 PM EDT10:29 PM UTCSeasonal
2004July 31, 20042:05 PM EDT6:05 PM UTC2nd full moon in a month
2005August 19, 20051:53 PM EDT5:53 PM UTCSeasonal
2007May 31, 20079:04 PM EDT1:04 AM UTC
(June 1)
2nd full moon in a month
2008May 19, 200810:11 PM EDT2:11 AM UTC
(May 20)
Seasonal
2009December 31, 20092:13 PM EST7:13 PM UTC2nd full moon in a month

2010-2019 Blue Moons

From 2010 to 2019 there have been 8 blue moons. August 2012, July 2015, January 2018, and March 2018 each had a second full moon during their months. November 2010, August 2013, May 2016, and May 2019 each as a seasonal blue moon as each of their seasons had 4 full moons

The blue moons that occurred from 2010 to 2019 include:

YearBlue MoonUS Eastern TimeUTC TimeBlue Moon Type
2010November 21, 201012:27 PM EST5:27 PM UTCSeasonal
2012August 31, 20129:58 AM EDT1:58 PM UTC2nd full moon in a month
2013August 20, 20139:45 PM EDT1:45 AM UTC
(August 21)
Seasonal
2015July 31, 20156:43 AM EDT10:43 AM UTC2nd full moon in a month
2016May 21, 20165:15 PM EDT9:15 PM UTCSeasonal
2018January 31, 20188:27 AM EST1:27 PM UTC2nd full moon in a month
2018March 31, 20188:37 AM EDT12:37 PM UTC2nd full moon in a month
2019May 18, 20195:11 PM EDT9:11 PM UTCSeasonal

2020-2023 Blue Moons

From 2020 to 2023 there have been 3 blue moons. October 2020 had a second full moon during the month on Halloween and August 2023 had a second full moon at the end of the month. August 2021 had a seasonal blue moon as Summer had 4 full moons that year.

The blue moons that occurred from 2020 to 2023 include:

YearBlue MoonUS Eastern TimeUTC TimeBlue Moon Type
2020October 31, 202010:49 AM EDT2:49 PM UTC2nd full moon in a month
2021August 22, 20218:02 AM EDT12:02 PM UTCSeasonal
2023August 30, 20239:35 PM EDT1:35 AM UTC
(August 31)
2nd full moon in a month
Full moon colored blue for the dates of Blue Moons since 2000